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200 Series
Brown Devil® Vitreous Enamel Power
Ohmite’s Brown Devil® is a small, exceptionally
durable power resistor. It features all-welded con-
struction and rugged, flame resistant conformal lead
free vitreous enamel coating to ensure successful
performance under high temperatures.
The wirewound 200 Series has a hollow-core con-
struction, which accommodates rigid mounting with
brackets or thru bolts.
Mounting brackets not included with resistors.
Series Wattage Ohms Lead Gauge Max. Voltage*
B5 5.25 0.1-20K 20 187
B8 8.0 0.03-25K 18 250
B12 12.0 0.08-51K 18 625
B20 20.0 0.1-100K 18 750
Non-Inductive versions available. Insert “N” before tolerance code.
Example: B5NJ10RE
Also available in low cost Centohm or Silicone coating. Consult Ohmite.
* Maximum Voltage is based on Ohm’s Law [V=√P*R] as limited by the resis-
tance value of specified product
CHARACTERISTICS
FEATURES
•Ruggedleadfreevitreousenamelcoating
•All-weldedconstruction.
•Selfsupportingterminalmountingoption.
•Higherpowerratings.
•Flame-resistantleadfreevitreousenamelcoating.
•RoHScompliantproductavailable.Add“E”suffixto
part number to specify.
SERIES SPECIFICATIONS
Coating
lead-free vitreous enamel
Core
Ceramic
Terminals
Tinned axial; RoHS solder composition is 96% Sn, 3.5%
Ag, 0.5% Cu
Derating
Linearly from 100% @ +25°C to 0% @ +350°C
Tolerance
1Ω+: ±5%
under 1Ω: ±10%
Power rating
Based on 25°C free air rating
Overload
10 times rated wattage for 5 seconds
Temperature coefficient
5Ω and under: ±400 ppm/°C
Above 5Ω: ±260 ppm/°C
Max. amps
To calculate, use the formula √P/R
(continued)